1 /****************************************************************************** 2 * 3 * Module Name: exresnte - AML Interpreter object resolution 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "acpi.h" 153 #include "accommon.h" 154 #include "acdispat.h" 155 #include "acinterp.h" 156 #include "acnamesp.h" 157 158 159 #define _COMPONENT ACPI_EXECUTER 160 ACPI_MODULE_NAME ("exresnte") 161 162 163 /******************************************************************************* 164 * 165 * FUNCTION: AcpiExResolveNodeToValue 166 * 167 * PARAMETERS: ObjectPtr - Pointer to a location that contains 168 * a pointer to a NS node, and will receive a 169 * pointer to the resolved object. 170 * WalkState - Current state. Valid only if executing AML 171 * code. NULL if simply resolving an object 172 * 173 * RETURN: Status 174 * 175 * DESCRIPTION: Resolve a Namespace node to a valued object 176 * 177 * Note: for some of the data types, the pointer attached to the Node 178 * can be either a pointer to an actual internal object or a pointer into the 179 * AML stream itself. These types are currently: 180 * 181 * ACPI_TYPE_INTEGER 182 * ACPI_TYPE_STRING 183 * ACPI_TYPE_BUFFER 184 * ACPI_TYPE_MUTEX 185 * ACPI_TYPE_PACKAGE 186 * 187 ******************************************************************************/ 188 189 ACPI_STATUS 190 AcpiExResolveNodeToValue ( 191 ACPI_NAMESPACE_NODE **ObjectPtr, 192 ACPI_WALK_STATE *WalkState) 193 194 { 195 ACPI_STATUS Status = AE_OK; 196 ACPI_OPERAND_OBJECT *SourceDesc; 197 ACPI_OPERAND_OBJECT *ObjDesc = NULL; 198 ACPI_NAMESPACE_NODE *Node; 199 ACPI_OBJECT_TYPE EntryType; 200 201 202 ACPI_FUNCTION_TRACE (ExResolveNodeToValue); 203 204 205 /* 206 * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the 207 * object that is attached to the Node. 208 */ 209 Node = *ObjectPtr; 210 SourceDesc = AcpiNsGetAttachedObject (Node); 211 EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); 212 213 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n", 214 Node, SourceDesc, AcpiUtGetTypeName (EntryType))); 215 216 if ((EntryType == ACPI_TYPE_LOCAL_ALIAS) || 217 (EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS)) 218 { 219 /* There is always exactly one level of indirection */ 220 221 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object); 222 SourceDesc = AcpiNsGetAttachedObject (Node); 223 EntryType = AcpiNsGetType ((ACPI_HANDLE) Node); 224 *ObjectPtr = Node; 225 } 226 227 /* 228 * Several object types require no further processing: 229 * 1) Device/Thermal objects don't have a "real" subobject, return Node 230 * 2) Method locals and arguments have a pseudo-Node 231 * 3) 10/2007: Added method type to assist with Package construction. 232 */ 233 if ((EntryType == ACPI_TYPE_DEVICE) || 234 (EntryType == ACPI_TYPE_THERMAL) || 235 (EntryType == ACPI_TYPE_METHOD) || 236 (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) 237 { 238 return_ACPI_STATUS (AE_OK); 239 } 240 241 if (!SourceDesc) 242 { 243 ACPI_ERROR ((AE_INFO, "No object attached to node [%4.4s] %p", 244 Node->Name.Ascii, Node)); 245 return_ACPI_STATUS (AE_AML_UNINITIALIZED_NODE); 246 } 247 248 /* 249 * Action is based on the type of the Node, which indicates the type 250 * of the attached object or pointer 251 */ 252 switch (EntryType) 253 { 254 case ACPI_TYPE_PACKAGE: 255 256 if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE) 257 { 258 ACPI_ERROR ((AE_INFO, "Object not a Package, type %s", 259 AcpiUtGetObjectTypeName (SourceDesc))); 260 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 261 } 262 263 Status = AcpiDsGetPackageArguments (SourceDesc); 264 if (ACPI_SUCCESS (Status)) 265 { 266 /* Return an additional reference to the object */ 267 268 ObjDesc = SourceDesc; 269 AcpiUtAddReference (ObjDesc); 270 } 271 break; 272 273 case ACPI_TYPE_BUFFER: 274 275 if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER) 276 { 277 ACPI_ERROR ((AE_INFO, "Object not a Buffer, type %s", 278 AcpiUtGetObjectTypeName (SourceDesc))); 279 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 280 } 281 282 Status = AcpiDsGetBufferArguments (SourceDesc); 283 if (ACPI_SUCCESS (Status)) 284 { 285 /* Return an additional reference to the object */ 286 287 ObjDesc = SourceDesc; 288 AcpiUtAddReference (ObjDesc); 289 } 290 break; 291 292 case ACPI_TYPE_STRING: 293 294 if (SourceDesc->Common.Type != ACPI_TYPE_STRING) 295 { 296 ACPI_ERROR ((AE_INFO, "Object not a String, type %s", 297 AcpiUtGetObjectTypeName (SourceDesc))); 298 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 299 } 300 301 /* Return an additional reference to the object */ 302 303 ObjDesc = SourceDesc; 304 AcpiUtAddReference (ObjDesc); 305 break; 306 307 case ACPI_TYPE_INTEGER: 308 309 if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER) 310 { 311 ACPI_ERROR ((AE_INFO, "Object not a Integer, type %s", 312 AcpiUtGetObjectTypeName (SourceDesc))); 313 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 314 } 315 316 /* Return an additional reference to the object */ 317 318 ObjDesc = SourceDesc; 319 AcpiUtAddReference (ObjDesc); 320 break; 321 322 case ACPI_TYPE_BUFFER_FIELD: 323 case ACPI_TYPE_LOCAL_REGION_FIELD: 324 case ACPI_TYPE_LOCAL_BANK_FIELD: 325 case ACPI_TYPE_LOCAL_INDEX_FIELD: 326 327 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 328 "FieldRead Node=%p SourceDesc=%p Type=%X\n", 329 Node, SourceDesc, EntryType)); 330 331 Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc); 332 break; 333 334 /* For these objects, just return the object attached to the Node */ 335 336 case ACPI_TYPE_MUTEX: 337 case ACPI_TYPE_POWER: 338 case ACPI_TYPE_PROCESSOR: 339 case ACPI_TYPE_EVENT: 340 case ACPI_TYPE_REGION: 341 342 /* Return an additional reference to the object */ 343 344 ObjDesc = SourceDesc; 345 AcpiUtAddReference (ObjDesc); 346 break; 347 348 /* TYPE_ANY is untyped, and thus there is no object associated with it */ 349 350 case ACPI_TYPE_ANY: 351 352 ACPI_ERROR ((AE_INFO, 353 "Untyped entry %p, no attached object!", Node)); 354 355 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */ 356 357 case ACPI_TYPE_LOCAL_REFERENCE: 358 359 switch (SourceDesc->Reference.Class) 360 { 361 case ACPI_REFCLASS_TABLE: /* This is a DdbHandle */ 362 case ACPI_REFCLASS_REFOF: 363 case ACPI_REFCLASS_INDEX: 364 365 /* Return an additional reference to the object */ 366 367 ObjDesc = SourceDesc; 368 AcpiUtAddReference (ObjDesc); 369 break; 370 371 default: 372 373 /* No named references are allowed here */ 374 375 ACPI_ERROR ((AE_INFO, 376 "Unsupported Reference type 0x%X", 377 SourceDesc->Reference.Class)); 378 379 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 380 } 381 break; 382 383 default: 384 385 /* Default case is for unknown types */ 386 387 ACPI_ERROR ((AE_INFO, 388 "Node %p - Unknown object type 0x%X", 389 Node, EntryType)); 390 391 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 392 393 } /* switch (EntryType) */ 394 395 396 /* Return the object descriptor */ 397 398 *ObjectPtr = (void *) ObjDesc; 399 return_ACPI_STATUS (Status); 400 } 401